MIL-HDBK-1013/1A
butyral is used.
A space separates the bullet-resistant glass from the spall
shield. The number of hits that can be defeated is a function of the number
of laminations:
Number of Hits
Minimum Number of Laminations
1
6
2
7
3
8
The bullet-resistant glass and spall shield should be mounted so
that it can be removed for cleaning and can be easily replaced if chipped,
crazed, of scratched. The same should apply to the protective shield if
employed on the exterior of the window. Mounting should be coordinated with
the wall
208